Potential problem with 14-24

My dear beloved 14-24mm f:2.8 got crashed on the floor on first day of operations. I went to Nikon with it and they basically wouldn't touch it and suggested a replacement (for a hefty price). Since I had not broken any glass, but had broken part or the built-in hood and had caused what seemed some damage on the zoom mechanism, I went to a local camera repair shop which has a great reputation among pros here and asked them to do what they could. Now the zoom feels almost perfect and I am still waiting for the replacement hood. However, I went out and did some night shooting and it seems to me that there is an abnormal amount of ghosting around the lights, although I have no real reference against which to judge the lens performance since I have no other lens that wide. From the image I am including, what is your opinion?